package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {
    /**
     * 正常访问，一切OK
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池:" + Thread.currentThread().getName() + "paymentInfo_OK,id: " + id + "\t" + "O(∩_∩)O";
    }

    /**
     * 超时访问，演示降级
     *
     * @param id
     * @return
     */
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOut_fallback", commandProperties = {
            //设置超时时间 如果小于3s不执行服务降级 如果大于3s则执行服务降级
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    public String paymentInfo_TimeOut(Integer id) {
        Integer timeout = 1;
        try {
            TimeUnit.SECONDS.sleep(timeout);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池:" + Thread.currentThread().getName() + "paymentInfo_TimeOut,id: " + id + "\t" + "O(∩_∩)O，耗费" + timeout + "秒";
    }

    public String paymentInfo_TimeOut_fallback(Integer id) {
        return "线程池:" + Thread.currentThread().getName() + "\t执行了paymentInfo_TimeOut()方法的服务降级┭┮﹏┭┮";
    }


    //=========服务熔断
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",  //熔断回调
            commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), //开启短路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), //10秒 10个 如果错60% 断开
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"),
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("******id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();

        return Thread.currentThread().getName() + "\t" + "调用成功，流水号: " + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能负数，请稍后再试，/(ㄒoㄒ)/~~   id: " + id;
    }
}